Why this update archive is not for the newest version official firmware?The last official firmware is _20170612, but in this firmware is written about the update for _20170412(this can be seen in the name of the archive)

I know that the _20170412 version has fewer features than the firmware _20170612Why the update is not for firmware _20170612 ?Where is the mistake ?What firmware has the most complete functionality ?

There are two versions of this phone, one that came with android 6 (may have updated to 7 later) and one that was delivered directly with android 7. Not every firmware version fits to both phones. 20171102 is the latest released version.

If I bought a phone with android 7 and firmware 20170612 (were no updates OTA), will this new firmware 20171102 fit for my phone ?How to know ?Looking at the name of archive firmware 20171102 it seems that this is update for firmware 20170412, where there is no HOTKNOT, which is present in version 20170612.And for what of two versions phone exactly fits this latest released firmware 20171102 ?

I bought BV7000 2 weeks ago in Bulgaria, Europe, local dealer, they say official importer of Blackview products.My Build number is BV7000_Blackview_20170412, serial number: 0123456789ABCDEF, how can I know this is an original BV7000 or not? Not bad at all, but following:1) Display issues - last row not so clear and sharp, especially by white color (Settings menu cant be changed, remains always white), when dark or colors is ok. Display is flickering during game (I have only 1 game - Subway Surfers, 1 app - AnTuTu installed), seems also to lack performance. Same game had no problems on old Lumia, 512 MB RAM ??? When locked, under specific light, you can see horizontal lines of the matrix/touch panel or whatsoever. Is this normal?2) According to AnTuTu and a dozen of battery apps, the battery is only 1 000 mAh? Could this be real? I calibrated it, but no more than one full day power. No wifi, also switched off data usage, no location, no Bluetooth, only one SIM on 3G network, 30 minutes calls and maybe 30-40 minutes browsing..... Each turning on the display costs 1 % or 2 %. Nights, for 8 hours looses 10 %, all switched off..Is all this normal, according to your technical data for this phone?3) I read all previous posts in the forum - my question is - can I update my BV7000 to 20171102 and is there a chance this to fix my issues? I contacted the dealer, they said if I do this, I am going to lose my guarantee??? How can I know if exactly my BV7000 fits to this update? I regularly check for wireless updates, but nothing till now. Can I expect OTA update to this, or even newer version?As I said, not a bad smartphone, but performance, battery life and display issues are much too important, even this is a budget device; they kind a make it not much useful. I also afraid about resistance, I doubt the IP68, never tested it, because I am not sure if I have the phone from the hundreds of videos in YouTube, showing how tough it is. I kindly ask for a reply, or I will have to give it back to the importer, thank you in advance;

I will repeat my question.How to update phones that were sold with firmware 20170612?OTA does not work for them. If there were different versions of the hardware, then what could be the problems with compatibility of firmware?Is the firmware 20171102 (or 20170412) compatible with these devices?